Bar or blade for the rolls of paper-pulp engines



(No Model.)

0. ANDERSON.

BAR 0R BLADE FOR THE ROLLS OF PAPER PULP ENGINES. No. 349.332. PatentedSept. 21, 1886.

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CHRISTIAN ANDERSON, OF APPLETON, WISCONSIN.

BAR O R BLADE FOR THE ROLLS OF PAPER-PULP ENGINES.

SPECIFICATION forming part of Letters Patent No. 349,332, datedSeptember 21, 1886.

Application filed June 21, 1886. Serial No. 205,769.

To all whom it may concern:

Be it known that I, CHRISTIAN ANDERSON, a citizen of the United States,residing at Appleton, in the county of Outagamie and State of Wisconsin,have invented a new and useful Improvement in Bars or Blades for theRolls of Paper-Pulp Engines, of which the following is a specification.

My invention relates to an improvement in the bars, the form in whichthey are manufactured, and manner of their attachment to the roll,whereby a roll may be filled or refilled, when required, With new bladesor bars, in a much shorter time than by the use of the blades asheretofore made, and without removing the roll to a machine-shop for thepurpose, and thereby diminishing the cost of the completed roll, andalso its repair when such is required. I attain these objects in themanner as illustrated in the accompanying drawings, in which' Figure lis a side elevation of a roll, showing the grooves therein in which theblades are to be inserted. Fig. 2 is an elevation of the larger end ofthe roll and showing the form of the aforesaid grooves, some of thegrooves having the improved blades inserted therein. Fig. 3 is avertical elevation of a portion of one of the blades upon an enlargedscale, and Fig. 4 is a vertical section of the same, taken upon the linea: a: of Fig. 3.

Similar figures of reference indicate like parts in the several views.

The roll lis such as is used in a paper-pulp engine, generally known asa Jordan engine, and has formed in its surface a series of dovetailedgrooves, 2. These grooves may all extend the entire length of the rollor only a portion of them, the remaining ones terminating at any pointin its length which is desirable. The blades 3 to be inserted in theaforesaid grooves are formed of a flat bar of steel, uniform in widthand thickness. Upon one side of it, along one of its edges, are formedindentations 4, they producing upon its opposite side a series ofprotuberances, 5. These protuberances are of uniform size and form, andshould be of such proportions and of such number toeach blade as willretain it firmly in the roll, when the blade is inserted therein, byentering one end of it in the groove 2 and driving it longitudinally'tothe desired point.

(No model.)

tions 4. and the protuberances 5 a curved form I of their surface isdesirable.

In order to make available the elasticity of the steel for the retentionof the blades within the grooves 2, it is preferable that the surface ofthe protuberances 5 be hyperboliform, although a slight deviation fromit is permissi ble. Rolls for this purpose have heretofore been made ofvarious styles, their blades requiring to havea portion removedbyaplaner that they may be entered into and secured in the grooves ofthe rolls. This method is expensive, requiring the removal of the rollto a machine-shop, the employment of expensive labor, the stoppage ofthe engine, and consequently a diminished product.

Thisimproved blade is inexpensive to manufacture, it requiring nomanipulation after leaving the rollingqnill but the formation of theprotu-beranccs and cutting into lengths required, which operationsrequire neither expensive machinery nor high priced labor. WVhen arenewal-of the blades becomes necessary, the ordinary workmen of a papermill are competent, and but a limited stoppage is required.

Having thus described my invention, what I claim, and desire to secureby Letters Patent, 1s

1. As a new article of manufacture, a blade for a roll for paper-pulpengines, formed of a flat bar of steel of uniform thickness, said barhaving formed upon one of its sides near one edge thereofindentations,they producing upon its opposite side a series ofprotuberances of uniform size, and adapted to enter and fill thedovetail portion of a groove of uniform width in the roll aforesaid,andto be retained therein by the compression of the sides and bottom ofsaid grooves upon the protuberances, the opposite plain surface andbottom of the blade, substantially as described.

2. As a new article of manufacture, ablade for a roll for paper-pulpengines, formed of a fiat bar of steel, uniform in thickness, said barhaving formed upon one of its sides near one edgethereofindentations,they producing upon its opposite side a series ofprotuberanees of uniform size, said indentations and protuberaneeshaving their surfaces hyperboliforni and adapting the blades forentering a longitudinal dovetailed groove in the surface of the roll,and be retained therein by the compression of the sides and bottom ofsaid groove upon the protuberanees, the opposite plain surface andbottom of the blade, substantially as set forth.

3. The combination, with a roll for paperpulp engines, having a seriesof longitudinal dovetail grooves formed in its surface, of a face andthe bottom of the blade, substantially as set forth.

CHRISTIAN ANDERSON.

\Vitnesscs:

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